3-halo-19-nor-delta5(10)-androsten-17beta-ol derivatives



3,076,827 3=HAL0=19-N0R-A -ANDRQSTEN-flp-OL DERIVATIVES Albert Bowers and John Edwards, Mexico City, Mexico, and .iohn A. Zderic, Palo Alto, Calif., assignors, by memo assignments, to Syntax Qorporation, a corporation of Panama No Drawing. Filed 5, E62, Set. N 177,259

20 Claims. (Cl. zen-397.5

The present invention relates to novel cyclopentanophenanthrene derivatives and to a process for the production thereof.

More particularly the present invention relates to novel 3-halo-l9-nor-A -androsten-175-01 derivatives.

The novel compounds of the present invention are represented by the following formula:

In the above formula X represents fluorine, chlorine or bromine; R represents hydrogen or methyl; R represents hydrogen or a hydrocarbon carboxylic acyl group of less than 12 carbons atoms and R represents hydrogen, lower alkyl, lower alkenyl or lower alkynyl. The wavy line at -3 denotes the substituent thereat is in a or steric configuration.

The acyl group is derived from hydrocarbon carboxylic acids containing less than 12 carbon atoms which may be saturated or unsaturated, of straight, branched, cyclic or cyclicaliphatic chain, aromatic and may be substituted by functional groups such as hydroxy, alkoxy containing up to 5 carbon atoms, acyloxy containing up to 12 carbon atoms, nitro, amino or halogen. Typical ester groups are the acetate, propionate, enanthate, benzoate, trimethylacetate, t-butylacetate, phenoxyacetate, cyclopentylpropionate, aminoacetate and ,B-chlompropionate.

The compounds represented by the above formula are progestational agents with high oral activity, exhibit antiestrogenic and anti-gonadotrophic activity and are useful in fertility control. In addition they lower the cholesterol level in blood, serum and adrenal.

The compounds object of the present invention are prepared by the process illustrated as follows:

l A m R- ti 1 MeO- (IV) (I Bfilhfi? Fatenied Feb. 5, E s

O R l In the above formulas X, R, R and R have the same meaning as previously set forth; R represents lower alkyl, lower allienyl or lower alkynyl.

In carrying out the process just outlined, the starting compound (I), which may be estradiolor the Z-methyl derivative thereof, is treated with methyl sulfate in a strongly basic medium, such as acetone-water solution of potassium hydroxide, to give respectively the B-methcity-A -estratrien-lZB-ol or the 2-methy1 derivative thereof (II). Reduction of the latter compounds under Birch conditions is productive of the respective 3-methoxy Ammo) estradien 17 3 01 (III). Conventional X AW benzoylation of the latter, followed by treatment in a mild acid medium, preferably oxalic acid solution in a suitable solvent, yields 19 nor A -androsten-l7fl-ol-3-onebenzoate or the Zea-methyl derivative thereof, which upon reduction, preferably with sodium borohydride in dioxane, furnish the respective 19-nor-A -androstene- 3fi,17;3-diol-17-benzoate (V). These compounds are treated with a halogenating agent, such as hydrogenfiuoride, phosphorus pentachloride or phosphorus pentabrornide, thus affording the 30; and 3B-tluoro, chloro or bromo 19-nor-A -androsten-17,8-ol-benzoate or the 2arnethyl derivatives thereof (VI). Conventional saponification of a compound selected from the group just mentioned is productive of the respective 17B-iree alcohol (VII: I'l -=31) which upon oxidation, preferably with 8 N chromic acid furnishes the corresponding 17-ketone (VIII). The latter compound is treated with a lower hydrocarbon magnesium halide, such as methyl magnesium bromide, vinyl magnesium bromide or ethynyl magnesium bromide thus affording the corresponding 17alower hydrocarbon 1713-01 derivative (IX: R ==H), as for example the Hot-methyl, vinyl or ethynyl-l7fi alcohols.

The above set forth compounds with a. secondary hydroxyl in the molecule (VII: R =H) are conventionally esterified in pyridine with an acylating agent, for

instance, the anhydride of a hydrocarbon carboxylic acid of the previously defined type. The compounds of the present invention having a tertiary hydroxy-l in the molecule (IX: R =H) are conventionally acylated in the presence of p-toluenesulfonic acid with an acylating agent, thus giving the corresponding 17fi-acylates (IX: R acyl).

The following specific examples serve to illustrate but are not intended to limit the scope of the present'invention:

Example I To a suspension of 25 g. of estradiol in 25 cc. of acetone there was added a solution of 70 g. of potassium hydroxide in 37.5 cc. of water and the stirred mixture was treated dropwise with 40 cc. of methyl sulfate. The reaction mixture was then stirred for 45 minutes further, poured into dilute hydrochloric acid solution and the formed precipitate collected by filtration. Crystallization from chloroformamethanol gave 3-methoxy-A estratrien-l7B-ol.

Following the same procedure Z-methyl-estradiol (Iriarte et al., Tetrahedron, vol. 3, pp. 28-36, 1958), was converted into 2-methyl-3-methoXy-A estnatrien-1'7B-ol.

Example 11 Example III A mixture of 1 g. of 3-methoxy-A -estradien-l7,8- ol, 4 cc. of pyridine and 2 cc. of benzoyl chloride was kept at room temperature overnight, poured into ice water, the formed precipitate was filtered, washed with water and dried. Crystallization from acetone-hexane gave the 17- benzoate of 3-rnethoxy-A -estradien-175-01.

2-methyl-3-methoxy-A -estradien-176-01 was treated by the above procedure thus yielding the l7-benzoate of 2-methyl-3-methoxy-A -estradien-17,8-01.

Example IV To a solution of 6 g. of the 17-benzoate of 3-methoxy- A -estradien-175-01 in 500 cc. of methanol were added 8 g. of oxalic acid dissolved in 10 cc. of water. The resulting mixture was kept at room temperature for 40 minutes. Then water was added and the formed precipitate filtered off, washed with water and dried. Recrystallization from acetone-hexane yielded the 17-benzoate of 1'9-nor-A -androsten-l7fl-ol-3-one.

Similarly the 17-benzoate of 2-methyl-3-rnethoxy- A -estradien-l7fl-ol was converted into the 17-benzoate of Zea-methyl-19-nor-A -androsten-l7fi-ol-3-one.

Example V A solution of 2 g. of sodium borohydride in 30 cc. of methanol was added with stirring to a solution of 2 g. of l'9-nor-A -androsten-17B-ol-3-one-benzoate in 40 cc. of tetrahyd'rofuran. The mixture was kept at room temperature overnight, the excess reagent was decomposed by ad dition of acetic acid, the resulting solution concentrated to small volume in vacuo and diluted with water. product was extracted with ethyl acetate, the extract washed with water, dried and evaporated. Crystal1ization of the solid from acetone-hexane gave 19-nor-A androstene-3p,17p-diol-17-benzoate.

The

When applying the above procedure to 2a-methyl-1'9- nor-A -androsten-l7fi-ol-3-one-benzoate there was obtained Zea-methyl-19-nor-A -androstene-Bfi,l7fi-diol-l7- benzoate.

Example Vl In a polyethylene flask, adapted with magnetic stirrer, there was dissolved 2.8 g. of l9-nor-A -androstene-3fi, 17,8-diol-17-benzoate in 30 cc. of methylene chloride, the solution was cooled to 0 C. and a solution of 12 g. of anhydrous hydrogen fluoride in 20 cc. of tetrahydrofuran cooled in a Dry Ice acetone bath (70 C.) was added over a period of 20 minutes with constant stirring. The mixture was stirred at a temperature lower than 10 C.- for 6 additional hours, then neutralized by cautiously adding a 5% aqueous sodium bicarbonate solution and trans-- ferred to a separatory funnel. The organic layer was washed with water, dried over anhydrous sodium sulfate and concentrated until formation of an abundant precipitate. The mixture was cooled, the precipitate filtered and redissolved in hot ethyl acetate, the insoluble material was filtered off and the filtrate evaporated to dryness whereby there was obtained a residue which upon chromatography afforded 3B-fluoro-l9-nor--A -androsten-17B-ol-benzoate and 3a-fluoro-19-nor-A -androsten-17,8-ol-benzoate.

By the same procedure 2a-rnethyl-l9-nor-A -androstene-3/3,17fi-diol-l7-benzoate was converted into 3;?- fluoro-Za-rnethyl 19-nor-A -androsten-l7fl-ol-benzoate and the Sa-fluoro isomer thereof.

Example VII To a solution of 5 g. of l9-nor-A -androstene-3fl, 17,8-diol-l7-benzoate in cc. of benzene were added 5 g. of phosphorous pentachloride and the resulting mixture was stirred at room temperature for 1 hour in the absence of moisture. It was then cooled, poured into water; the

- benzene layer was washed with water several times, dried "over anhydrous sodium sulfate and evaporated to dryness.

Chromatography of the residue yielded 3B-chloro-l9-nor- A -an'drosten-17,8-ol-benzoate and 300- chloro-l9-nor- M -androsten-17,8-ol-benzoate.

Following the above technique was treated Zea-methyll9-nor-A -androstene-3B,17/3-diol 17 benzoate thus yielding 3fl-chloro-2a-methyl-l9-nor-A -androsten-- ol-benzoate and the 3a-ch1oro isomer thereof.

Example VIII Example IX A solution of 1 g. of 3;.1-fluoro-19-nor-A -androsten- 17/8-ol-benzoate in 50 cc. of tetrahydrofuran was added over a 30 minute period to a stirred suspension of 1 g. of

lithium aluminum hydride in 50 cc. of anhydrous tetrahydrofuran. The mixture was refluxed for 2 hours, then cooled and cautiously treated with 5 cc. of ethyl acetate and 2 cc. of water. Solid sodium sulfate was added, the

inorganic material filtered off and thoroughly washed with hot ethyl acetate, the combined organic solutions upon evaporation yielded a crude material, which was purified by crystallization from acetone-hexane thus giving 3fi-fluoro-19-nor-A -androsten-Ufi-ol.

When applying the above procedure to the starting compounds under I there were obtained the corresponding products under II. l

35-ch1oro 19 nor-A androsten 175 ol-benzoate Sa-chloro 19 nor-A androsten 175 ol-benzoate 35-bromo 19 nor-A androsten 175-o1-benzoate Ba-brorno 19 nor-A androsten 175 ol-benzoate 35-fiuoro 2a methyl-19- nor-A -androsten 175- ol-benzoate 3a-fiuoro 2oz methyl-19- nor-A -androsten 17,8- ol-benzoate 35-ch10ro 20c methyl-19- nr-A -andr0steu 175- ol-benzoate 3oc-Ch10r0 2oz methyl-19- nor-A -androsten 175- ol-enzoate 35-bromo 2a methyl-19- n0r-A -andr0sten 175- ol-benzoate 3a-bromo 20c methyl-19- nor-A -androsten 175- ol-benzoate 3a-fluor0 19 nor-11 androsten 175 ol-benzoate 35-ch1oro 19 nor-A androsten-175-ol 3OL-Chl0l0 19 nor-11 androsten-175-ol 35-bromo 19 nor-A androsten-175-ol 3ot-br0rno 19 nor-A androsten-175-ol 35-f1uoro 2a methyl-19- nor A590) androsten- 175-01 3a-fiuoro 2c: methyl-19- nor A500) androsten- 175-01 35-chloro 21x -methy1-19- nor A500) androsten- 175-01 3a-Ch10r0 24x methyl-19- nor A androsten- 175-01 35 bromo 2a methyl- 19 nor A androsten-l75-o1 3ce-b101110 2a methyl-19- nor A500) androsten- 175-01 3a-fiu0ro 19 nor-A androsten-175-o1 Example X A solution of 1 g. of 35-1uoro-19-nor-A -androsten- 175-01 in cc. of acetone was cooled to 0 C. and treated under an atmosphere of nitrogen and with stirring, with a solution of 8 N chroni-ic acid (prepared by mixing 26 g. of chromium trioxide with 23 cc. of concentrated sulfuric acid and diluting with water to 100 cc.), until the color of the reagent persisted in the mixture. It Was stirred for 5 minutes further at 0-5 C. and diluted with water. The precipitate was collected, washed with water and dried under vacuum, thus affording a crude product which upon recrystallization from acetone-hexane gave 35-fluoro-19- nor-A -androsten-17-one.

The starting compounds under I were treated by the foregoing method yielding the products under II.

3B-chloro 1 9 nor-A androsten-17-one 3OL-C1'11OI'O 19 nor-A androaten-17-0ne 35-bromo 19 nor-A androsten-17-one 306-bY01T10 19 nor-A androsten-17-one 35-fiuoro 20c methyl-19- nor A590) androsten- 17-one 3cc-fl1l010 20c methyl-19- nor A androsten- 17-one 35-chloro 2o: methyl-19- nor A500) audrosten- 17-one Sa-chloro 2a methyl-19- nor A500) androsten- 17-one 35-bromo 2a methyl-19- nor A androsten- 17-one 3a-brom0 20c methyl-19- nor-A 0).androsten 01 3a-fiuor0 19 nor-A androsten-175-ol 3m-brorno 2a methyl-19- nor A590) audrosten- 17-one 3a-fiu0ro 19 nor-A androsten-17-one Example XI I product isolated by ethyl acetate extraction. The extract was washed with water, dried over anhydrous sodium sulfate and evaporated to dryness.

Recrystallization from methylene chloride-hexane aiforded 35- iuoro-17e-niethy1 19 nor-A -androsten- Following the above procedureythe starting compounds listed below were converted into the products disclosed hereinafter.

Starting Compound 35-chloro 19 nor-A 0 androsten-17-one 3u-chloro 19 nor-A androsten-17-one 35-bromo 19 nor-A andr0sten-17-one 3a-br0nio 19 nor- 5(1o androsten-17-one 35-fiuoro 20 methyl-19- nor A androsten-17- one 3a-fluoro 20a methyl-19- nor A500) androsten-17- one 35-ch1oro 2a methyl-19- nor A590) androsten-17- one 3u-chl0ro 2a methyl-19- nor A590) androsten-17- one 35-bron1o 20. methyl-19- nor A500) androsten-17- one 3ix-bromo 20c methyl-19- nor A590) androsten-l7- one 30L-fil1010 19 nor-A androsten-17-one Product 35-chlor0 17cc methyl- 19-nor A5110) androsten-175-ol 30t-Ch1OI'O 17a methyl- 19-n0r A5111?) androsten-175-ol 35-brorno 171x methyl- 19-n0r A500) androsten-175-o1 Sea-brorno 17cc methyl- 19-nor A5110) androsten-175-ol 35-fluoro 204,170; diinethyl 19 nor-A androsten-175-o1 3a-lluoro 20:,1711 (11- methyl 19 nor-A androsten-175-ol 35 chloro 2a,17a dinrethyi 19 nor-11 androsten-175-ol 30c 311101'0 20:,1704 dimethyl 19 nor-A androsten-175-ol 35 brorno 2a,17ot dimethyl 19 nor-A andr0sten-175-ol 3oz bromo 2a,17o dimethyl 19 nor-A androsten-175-o1 3a fluoro 17a methyl- 19 nor A androsten-175-ol Example XII nor-A -androsten-175-01.

By the same procedure, the starting compounds under I were transformed into the products under H.

35-chlor0 19 nor-A 0 androsten-17-one 3a-Cl11010 19 nor-A androsten-17-one 35-chl0ro 17a vinyl-19- nor A590) androsten- 175-01 Boa-chloro 17a vinyl-19- nor A androsten- 175-01 3,19-brm0 19 nor-A androsten-17-0ne 3a-brom0 19 nor A androsten-17-one Sfl-fluoro 20c methyl-19- no-r A androsten- 17-one 30t-flUOIO 2oz methyl-19- nor A androsten- 17-one 3fi-chlor0 20c methyl-19- nor A androsten- 3a-chloro 2a. methyl-19- nor A androsten- 3f3-bromo 2a methyl-19- nor A androsten- 3u-br0mo 2a methyl-19- nor A androsten- 3a-fluoro 19 nor-A 00).

androsten-17-0ne 3a-flu0ro 17a vinyl-19- nor A androsten- 175-01 Example XIII Sfl-fluoro-19-n0r-A -androsten-17-one was submitted to the treatment described in Example XI, except that methyl magnesium bromide was substituted by ethynyl magnesium bromide, thus giving 313-flu0r0-17a-ethynyl-19- n0r-A -androsten-17 8-01.

When applying the same procedure to the starting compounds listed below, there were produced the corresponding products hereinafter set forth.

Starting Compound 3fl-chloro 19 nor-A androsten-17-0ne 3oc-ch1010 19 nor-M androsten-17-oue 3B-bromo 19 nor-A androsten-17-one 3ot-br0m0 19 nor-A andr0sten-17-one 3/3-fiu0ro 2a methyl-19- nor A androsten-17- one 3a-flu0ro 20c methyl-19- nor A590) andr0sten-17- one 3 3-chloro 2oz methyl-19- nor A andr0sten-17- one 3a-chloro 2a. methyl-19- nor A androsten-17- one 3 9-br0m0 2a methyl-19- nor A500) andr0sten-17- one Product 35 chloro 17oz ethynyl- 19-n0r A500) androsten-17fi-ol 3a-Ch1010 17a ethynyl- 19-n0r A500) androsten-l7 8-ol 3fl-br0n10 17d ethynyl- 19-n0r A androsten-17/8-o1 30c bromo 17a ethynyl- 19-n0r A500) androsten-17/3-01 3,8-fluoro 20c methyl- 17ot-ethyny1 19 nor- A (10)-androsten 17 3- 01 3a-fluor0 2a methyl- 17a-ethyny1 19 nor- A -andr0sten 17,8- 01 3,8-chl0r0 2a methyll7ot-ethynyl 19 nor- A androsten 175- 01 3a-Chl0l'0 20a methyl- 17u-ethynyl 19 nor- A androsten 17p- 01 BB-bromo 2a methyl- 17a ethynyl 19 nor- A androsten 17B- 01 Starting Compound Soc-13101110 2a methyl-19- nor A500) androsten-17- one Product 3u-bromo 2a methyl- 17tx-ethynyl 19 nor- A androsten 17,8- 01 Example XIV under 11.

3,8-chloro 19 nor-A 00)- androsten-NB-ol 3fl-bromo 19 nor A androsten-l7 8-ol- 3ot-brorno 19 nor-A androsten-17fl-o1 acetate of 3 8 ch1oro-19- nor A androsten- 1713-01 acetate of 3a chlor0-19- nor A590) androsten- 173-01 acetate of 3/3 brom0-19- nor A androsten- 17 8-01 acetate of 30a brom0-19- nor A 00) androsten- 17 3-01 Bfl-fluoro 2a methyl-19- acetate of 3B fillOIO-Zocnor A500) androstenmethyl 19 -nor-A 175-01 andr0sten-17p-ol 3a-fluoro 2a methyl-19- acetate of 3c; fluoro-Zunor A androstenmethyl 19 -n0r-A 175-01 andr0sten-17fi-ol 3,3-chl0r0 2a methy1-19- acetate of 36 ChlOl'O-Zotnor A androstenmethyl 19 nor-M 17fl-0l androsten-17B-0l 3tx-ch1or0 2oz methyl-19- acetate of 3a ch1oro-2anor A500) androstenmethyl 19 nor-M 175-01 andr0sten-17p-01 3 8-bromo 2a methyl-19- acetate of 3B bromo-Zanor A androstenmethyl 19 nor-A 17,8-01 androsten-17fi-0l 3oc-b10m0 20a methyl-19- acetate of 3a bromo-Zanor A500) androstenmethyl 19 nor-A 17 3-01 androsten-17p-o1 3a-flu010 19 nor-A acetate of 3ot-fluoro. 19-

androstcn-17fi-ol nor A androsten- 17,8-01 Example XV To a solution of 5 g. of 3(3-fluoro-17a-methy1-l9-nor- A -androsten-l7/3-0l in cc. of anhydrous benzene there were added 1 g. of p-toluenesulfonic acid and 10 cc. of acetic anhydride and the mixture was allowed to stand for 24 hours at room temperature, poured into ice and water, and the resulting mixture stirred toeffect hydrolysis of the excess anhydride. The benzene layer was separated and washed with 10% sodium carbonate solution and water. Drying, evaporation and crystallization of the residue from ether-hexane produced the acetate of 3p-flu0ro-17a methyl-19-nor-A -androsten-17fi-ol'.

The starting compounds listed below were treated by the preceding method, thus furnishing the corresponding products hereinafter set forth.

Starting Compound Product 3 fi-chl0r0-17a-methyl-19- nor-A -androsten- 1713- 3a-chlor0-17a-methyl-19- nor-A -androsten-17p- 01 

1. A COMPOUND OF THE FOLLOWING FORMULA: 